Totally. We see architectural drawings that go through a number of revisions and it’s not uncommon for designers to simply cover a whole section with a white box and then draw on top of it.
Also within PDFs (and svgs) you normally clip the area you’re going to draw into to bound it (sort of like overflow:hidden) and anything outside of that doesn’t display, but it’s still there and accessible.
I marvel more at the fact that software is capable of figuring out all the occlusions so you can print the stuff on a plotter. Cad drawings have up to 2M individual vectors in them. Its impressive that it works at all to be honest.
Also within PDFs (and svgs) you normally clip the area you’re going to draw into to bound it (sort of like overflow:hidden) and anything outside of that doesn’t display, but it’s still there and accessible.
I marvel more at the fact that software is capable of figuring out all the occlusions so you can print the stuff on a plotter. Cad drawings have up to 2M individual vectors in them. Its impressive that it works at all to be honest.